steve day's doctors diagnosed him with black lung. >> my doctor says my lungs are shot. >> reporter: doctors at johns hopkins hospital, hired by the coal company, rejected the diagnosis and, we found, that of hundreds of other miners, saving the companies millions of dollars. the head of the black lung unit at hopkins, dr. paul wheeler, did not find a single case of severe black lung in available cases we examined since the year 2000, not one. >> that's my opinion and i have a perfect right to my opinion. >> reporter: but we found his opinion has been wrong a lot. gary fox was denied black lung benefits for ten years after dr. wheeler read his x-ray as negative. it was only after fox's death at the age of 58 that an autopsy concluded fox did indeed have black lung. >> you have a system that for so many miners is rigged against them. >> reporter: now hopkins has announced it is spending the black lung program while it reviews the findings of our investigation. >> i'd like to see the truth come out. i'd like to see the wrongdoers in this system exposed. >> reporter: steve day and his w